PIG-3572: Fix all unit test for during build pig with Hadoop 2.X on Windows

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.12@1552146 13f79535-47bb-0310-9956-ffa450edef68
PIG-3592: Should not try to create success file for non-fs schemes like hbase (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.12@1552159 13f79535-47bb-0310-9956-ffa450edef68
PIG-3621: Python Avro library can't read Avros made with builtin AvroStorage (rusell.jurney via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.12@1552215 13f79535-47bb-0310-9956-ffa450edef68